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Using functional magnetic resonance imaging to scan a person's brain when they thought about making a "rock", "paper", and "scissors" shape with their hands, then mapping the scans to robot hand actions, researchers could effectively control the metal grabber just by their mind alone.

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Though the scientists say they need "several breakthroughs in related technologies, including those for brain scanning hardware, before this type of non-invasive systems will be used in daily life", this provides hope for amputees to someday have a mechanical limb that works as well as their original one.

So, seeing as both this and the technology for growing back human limbs is quite a while's off, which would you rather have? Would you like a robot arm that's 10x stronger than normal, or a soft mushy arm that won't make babies cry?